Towards Efficient Electrically-Driven Deep UVC Lasing: Challenges and Opportunities.

The major issues confronting the performance of deep-UV (DUV) laser diodes (LDs) are reviewed along with the different approaches aimed at performance improvement. The impact of threading dislocations on the laser threshold current, limitations on heavy n- and p-doping in Al-rich AlGaN alloys, unavoidable electron leakage into the p-layers of (0001) LD structures, implementation of tunnel junctions, and non-uniform hole injection into multiple quantum wells in the active region are discussed. Special attention is paid to the current status of n- and p-type doping and threading dislocation density reduction, both being the factors largely determining the performance of DUV-LDs.

Tunable near-infrared Gires-Tournois resonators based on vanadium dioxide on gold film.

Vanadium dioxide (VO) has been proposed as a phase-change material in tunable photonic and optoelectronic devices. In such devices, a thin layer of VO is typically deposited on metallic or insulating surfaces. In this Letter, we report the reflectance spectra of a subwavelength structure consisting of a thin layer of VO deposited on a gold film in the near-infrared spectral range, particularly near the wavelength of 1550 nm, which is significant for telecommunication applications.

[A comparative study of the myeloprotective effect of dicarbamine and leucostim in experimental post-radiation bone marrow syndrome].

We studied the effect of dicarbamine and leucostim on myelopoiesis in experimental post-radiation bone marrow syndrome. Dicarbamine in different modes of administration and doses provided a high level of protection of proliferating hematopoietic precursors in the early period after radiation, which was reflected in a statistically significant decrease in the depth and duration of post-radiation deficit of cells, such as of granulocytes, lymphocytes, megakaryocytes and erythroid cells. The greatest effect of the drug appeared at a dose of 4 mg/kg (prophylactic administration) and a dose of 15 mg/kg (curative double dose).

[Comparative study of the hemato-protective effect of Dicarbamine and Leykostime in experimental radiation damage to the blood system].

There was studied the influence Dicarbamine and Leykostime on peripheral blood leukocyte composition of rabbits in experimental radiogenic damage to the blood system. Dicarbamine significantly insured the safety of circulating red blood cells, prevented the development of severe postradiation thrombocytopenia, reduced postradiation leukocytopenia, and accelerated the recovery of peripheral blood leukocytes to the initial level by segmented neutrophils and lymphocytes. Leukostime ensured the safety of peripheral blood leukocytes however was less effective than Dicarbamine to prevent postradiation deficit of circulating red blood cells and thrombocytes.

[Modification of hematosupressive action of ionizing radiation by dicarbamine].

There was studied the effect of different doses of Dicarbamine by means of oral medical-prophylactic and medical administration on the peripheral blood of rabbits in conditions of experimental radiation damage to the blood system. The drug provided the safety of circulating red blood cells at rather high level, prevented the development of severe post-radiation thrombocytopenia, reduced post-radiation leukocytopenia, accelerated processes of recovery of peripheral blood leukocytes to the initial level by segmented neutrophils and lymphocytes.

[Hematoprotective effectiveness of dicarbamin in experimental post-radiation bone marrow syndrome].

The effect of dicarbamin on cellular composition of rabbits' venous blood in experimental post-radiation bone marrow syndrome was studied. The dicarbamin use has allowed to reduce depth and to shorten the duration of post-radiation leukocytopenia.

[Effect of dicarbamine on medullary hemopoiesis in experimental post-irradiation bone-marrow syndrome].

The effect of dicarbamine on hemopoiesis in experimental post-irradiation bone-marrow syndrome was studied. The myeloprotective activity of the drug was established. It manifested in the protection of hematopoietic progenitor cells and stimulation of cell proliferation and differentiation in the bone marrow.

[Water decontamination in the swimming pools: standardization and practice].

Practical examples were used to analyze possible ways and regimens of water decontamination with chlorine and ozone in the swimming pools when oxidants substantially interacted with the mineral and albuminoid ammonias that were present in the water. Ozone water decontamination was shown to be more effective than water chlorination and to rule out the generation of chloramines that were responsible for their strong irritating activity. Redox potential measurement used as an auxiliary method substantially alleviates on-line technological monitoring of the efficiency of water decontamination at the critical control point during chlorination and, during ozonation, makes up the existing gap of the current SanPiN 2.

The anodization voltage influence on the properties of TiO2 nanotubes grown by electrochemical oxidation.

A systematic study of titanium dioxide (TiO2) nanotubes (NTs) grown by electrochemical anodization in NH4F + glycerol electrolyte has been carried out in a broad range of anodization voltage of 5-350 V and acid concentration of 0.1-0.7 wt%.